Merge branch '342651-remove-feature-flag' into 'master'

Remove search_blobs_language_aggregation FF

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/112073



Merged-by: Paul Slaughter <pslaughter@gitlab.com>
Approved-by: Paul Slaughter <pslaughter@gitlab.com>
Approved-by: John Mason <9717668-john-mason@users.noreply.gitlab.com>
Approved-by: Dmitry Gruzd <dgruzd@gitlab.com>
Approved-by: Tomas Bulva <tbulva@gitlab.com>
Reviewed-by: Dmitry Gruzd <dgruzd@gitlab.com>
Co-authored-by: Terri Chu <tchu@gitlab.com>
Co-authored-by: Ashraf Khamis <akhamis@gitlab.com>